doc: improve HACKING.md

[chanchiwai-ray]

Description

Add some missing dependencies for running unit test and static checks locally.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• CleanCode (Code refactor, test updates, does not introduce functional changes)
• Documentation update (Doc only change)

How Has This Been Tested?

Created a LXD VM and install the following dependencies, and make sure make check-unit and make check-static can run without issues.

sudo apt update
sudo apt install gcc make shellcheck 
sudo add-apt-repository ppa:dqlite/dev 
sudo apt install libdqlite-dev
sudo snap install go --classic
export PATH=$PATH:$HOME/go/bin

git clone https://github.com/canonical/microceph.git
cd microceph/microceph
make

Contributor's Checklist

Please check that you have:

• self-reviewed the code in this PR.
• added code comments, particularly in hard-to-understand areas.
• updated the user documentation with corresponding changes.
• added tests to verify effectiveness of this change.

[UtkarshBhatthere]

LGTM, thanks @chanchiwai-ray